Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eaeeb1cf9242c2f9070002db7a17c8a07e889dc881073390fd2947d4eab1c31' 
  AND token = 'VSPxNPUxZ4fsB3yxbdVY2F84H3Mubni83ZaYhrn5jJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}